sql - 为sql server在一列中提取具有多个日期的记录

Question

我有一个包含几列的表，但想从一个特定列（销售编号）中提取数据。

销售编号 列由一组由 [-] 分隔的数字组成，即401001-402001-403001-404001

当进行销售时，401001输入所有四个中的一个或组合。我试图拉的只是（402001和404001）组合的销售；401001单身；402001作为两倍。请参阅以下查询。先感谢您！！！！

select 
     sum(case 
             when (salesno like '402001' and salesno like '%404001%') then 1 else 0 
         end) as [combo]
from 
     table1
where 
    (salesno like '%402001%' and salesno like '%404001%')
    and (salesno not like '%401001%')
    and (salesno not like '%402001%')
    and (salesno not like '%403001%')
    and (salesno not like '%404001%')
    and saledate between '10/01/2013' and '10/31/2013'
group by
    (case when (salesno like '402001' or salesno like '%404001%')